That drei bond is really just loctite. But that goes in between the head gasket and the lower timing cover, you're not taking off the heads. If you're referring to the seal between the upper timing case covers and the valve cover gasket, then I use black silicone RTV. Do you have the right tools to do this with the heads still on the car? It's pretty tight in there, I've found a lot of tool sets that are too big for this particular engine